🍇 Dancing raisins and fizzy water: the whole packet

🍇 Dancing raisins and fizzy water · 1st–4th grade · 1 day of testing · about $2 · 40 minutes a sitting

My days, if the fair is 14 days away

Count back from your fair day and write in each date. Fewer days than this? The jobs share days, in this order; nothing is skipped.

Dates from my teacher

• My question is due
• Testing starts
• My results table and graph are due
• My board is due

In this packet

1. 🗓️ My project plan
2. 💭 My hypothesis
3. 🧺 Change, measure, keep the same
4. 🪜 My steps
5. 📊 My results
6. 📓 My logbook
7. ✅ My conclusion
8. ✂️ Board titles to cut out
9. 🏅 The judge's questions and my certificate

If I change what kind of water the raisin is in, then how many times the raisin rises to the top in two minutes will ________________, because _____________________________________________

What I think will happen, in my own words:

3 levels × 3 tries at each = 9 tries in all. If anything you keep the same changes, you won't know which change made the difference.

What I need

• 🫧 Plain fizzy water (club soda or seltzer), freshly opened: 2 small bottles, one opened the night before
• 🚰 Water from the tap
• 🍇 Raisins: 9, the same size
• 🥛 Clear plastic cups, all the same size: 9, the same size
• 🥛 A measuring cup
• 🥄 A spoon
• ⏱️ A stopwatch or a kitchen timer
• 🩹 Masking tape, to mark lines

Be safe: 👶 Small parts · 🚫 Test food is not for eating · 💧 Water

1. The night before, pour half a cup of fizzy water into each of three clear cups and leave them out, uncovered.
2. Next day, open a fresh bottle and pour half a cup of fizzy water into three more clear cups.
3. Pour half a cup of tap water into three more clear cups.
4. Label the cups with tape: old fizz, fresh fizz and tap.
5. Slide one raisin into a cup and start the timer.
6. Count each time the raisin floats all the way up to the top in two minutes.
7. Write the count in your table, and lift the raisin out with a spoon.
8. Test the other cups one at a time with a new raisin each time, fresh fizz first.
9. Fill in your table with all nine counts, and draw a bar graph.

Write each number in your results table the moment you measure it.

I changed: Water   I measured: how many times the raisin rises to the top in two minutes (rises)

MY GRAPH (a bar graph: water along the bottom, rises up the side)

What I noticed: ______________________________________________

Write something every day you work on it, even the days you only gather things. More days? The three-page logbook prints from peabody.kids/science-fair/templates/logbook.

My hypothesis was ☐ right ☐ partly right ☐ not right.

I know because my numbers show:

What surprised me, or what might have gone wrong (7th and up):

Next time I would test:

Idea: Change a second thing: shake the fizzy water gently before pouring, and graph the rises for shaken and still water.

1. What made you want to ask this question? Say something like: I wanted to know: do raisins dance longer in fizzy water?
2. What did you think would happen, and why? Say something like: I thought changing what kind of water the raisin is in would change how many times the raisin rises to the top in two minutes, and I wrote down why.
3. What did you change, and what did you measure? Say something like: I changed what kind of water the raisin is in (Fresh fizzy water, Fizzy water left open overnight, Tap water) and measured how many times the raisin rises to the top in two minutes in rises.
4. What did you keep the same, and why does that matter? Say something like: I kept raisins of the same size and half a cup of water in every cup the same, so only what kind of water the raisin is in was different.
5. How many times did you test it? Say something like: 3 times at each of my 3 levels, and I found the middle number.
6. What did you find out? Show me in your numbers. Say something like: Look at my table: Fresh fizzy water and Tap water gave different numbers, and here's the pattern.
7. Was your hypothesis right? How do you know? Say something like: My numbers show whether I was right, partly right or not, and I can show you where.
8. Did anything go wrong, or surprise you? Say something like: One try was odd, so I did it again and wrote it in my logbook.
9. If you did it again, what would you change or test next? Say something like: I'd change a second thing: shake the fizzy water gently before pouring, and graph the rises for shaken and still water.